extern void dfault_(int *IPARM, float *RPARM);
extern void vfill_(int *N, float *U, float *VALUE); 
extern void jcg_(int *N, int *IA, int *JA, float *A, float *RHS, float *U,
		 int *IWKSP, int *NW, float *WKSP,
		 int *IPARM, float *RPARM, int *IER);
